CN111244697B - Electrical connector - Google Patents

Electrical connector Download PDF

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Publication number
CN111244697B
CN111244697B CN202010029842.5A CN202010029842A CN111244697B CN 111244697 B CN111244697 B CN 111244697B CN 202010029842 A CN202010029842 A CN 202010029842A CN 111244697 B CN111244697 B CN 111244697B
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China
Prior art keywords
terminal
ground terminal
terminals
opening
row
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Active
Application number
CN202010029842.5A
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Chinese (zh)
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CN111244697A (en
Inventor
杨启晓
蒋铭
王永福
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Lotes Guangzhou Co Ltd
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Lotes Guangzhou Co Ltd
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Priority to CN202010029842.5A priority Critical patent/CN111244697B/en
Publication of CN111244697A publication Critical patent/CN111244697A/en
Priority to US17/001,819 priority patent/US11239590B2/en
Application granted granted Critical
Publication of CN111244697B publication Critical patent/CN111244697B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
    • H01R13/6473—Impedance matching
    • H01R13/6477—Impedance matching by variation of dielectric properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/73—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures connecting to other rigid printed circuits or like structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
    • H01R12/716—Coupling device provided on the PCB
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/75—Coupling devices for rigid printing circuits or like structures connecting to cables except for flat or ribbon cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/77—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/79—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures connecting to rigid printed circuits or like structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/50—Bases; Cases formed as an integral body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/652—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding   with earth pin, blade or socket
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/721—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures cooperating directly with the edge of the rigid printed circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/722—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures coupling devices mounted on the edge of the printed circuits
    • H01R12/724—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures coupling devices mounted on the edge of the printed circuits containing contact members forming a right angle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/516—Means for holding or embracing insulating body, e.g. casing, hoods
    • H01R13/518—Means for holding or embracing insulating body, e.g. casing, hoods for holding or embracing several coupling parts, e.g. frames

Abstract

An electrical connector, comprising: an insulating block having a plurality of openings in a thickness direction thereof; a plurality of terminals arranged along the left and right direction of the insulating block, each terminal having a fixing portion fixed in the insulating block, the fixing portion having an adjusting portion, a row of terminals including a plurality of first ground terminals, a plurality of second ground terminals and a plurality of differential signal terminal pairs, the arrangement corresponding to the left and right direction being: the adjusting part of the second grounding terminal is exposed in the opening, and the adjusting part of the first grounding terminal is not exposed in the opening, so that the resonance between the second grounding terminal and the first grounding terminal is reduced, and the generation of ground mode resonance is avoided.

Description

Electrical connector
[ technical field ] A method for producing a semiconductor device
The present invention relates to an electrical connector, and more particularly, to an electrical connector capable of improving high frequency characteristics.
[ background of the invention ]
A conventional electrical connector includes an insulative housing having a slot; two rows of terminals are respectively assembled on the insulating body, each row of terminals comprises a plurality of differential signal terminal pairs and a plurality of grounding terminals, two sides of each differential signal terminal pair are respectively provided with one grounding terminal so as to block crosstalk between two adjacent differential signal terminal pairs, each terminal is provided with a fixing part fixed on the insulating body, a contact part is exposed out of the slot so as to be butted with a butting element, and a welding part extends backwards from the fixing part to the insulating body so as to be welded on a circuit board.
However, with the increasing technological level, the frequency of signals transmitted by the electrical connector is higher and higher, and the requirement for the high frequency performance of the electrical connector is higher and higher, because the fixing portions of the two ground terminals respectively located at the two sides of the differential signal terminal pair are both fixed to the insulating body, the surrounding mediums of the two ground terminals are plastics, the dielectric coefficients of the surrounding mediums of the two ground terminals are equal, the electromagnetic energy of the two ground terminals is equal, and the electromagnetic wave peaks of the two ground terminals are overlapped and added, so the resonance between the two ground terminals is obvious, the ground mode resonance is easily generated, the high frequency performance of the electrical connector is seriously affected, and the requirement for transmitting high frequency signals cannot be met.
Therefore, there is a need for a new electrical connector to overcome the above problems.
[ summary of the invention ]
The invention aims to provide a method for reducing the resonance between a first grounding terminal and a second grounding terminal, which is characterized in that an opening is not arranged at an adjusting part of the first grounding terminal on an insulating block, an opening is arranged at an adjusting part of the second grounding terminal on the insulating block, so that the dielectric coefficients of surrounding media of the first grounding terminal and the second grounding terminal are unequal, the electromagnetic energy of the first grounding terminal and the electromagnetic energy of the second grounding terminal are unequal, and the electromagnetic wave peaks of the first grounding terminal and the second grounding terminal are not overlapped and added, thereby reducing the resonance between the first grounding terminal and the second grounding terminal and avoiding the ground mode resonance phenomenon.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electrical connector, comprising: an insulating block having at least one opening in a thickness direction thereof; at least one row of terminals arranged along the left and right directions of the insulating block, each terminal is provided with a fixing part fixed in the insulating block, the fixing part is provided with an adjusting part, one row of terminals comprises at least two first ground terminals, at least one second ground terminal and at least two differential signal terminal pairs, and the arrangement mode corresponding to the left and right directions is as follows: the first ground terminal, the differential signal terminal pair, the second ground terminal, the differential signal terminal pair and the first ground terminal are arranged in a staggered manner, the adjustment part of the second ground terminal is exposed in the opening, and the adjustment part of the first ground terminal is not exposed in the opening.
Further, both left and right side surfaces of the adjustment portion of the second ground terminal are exposed in the opening.
Further, a distance from a left side surface of the opening to the second ground terminal is equal to a distance from a right side surface of the opening to the second ground terminal.
Further, the differential signal terminal pair includes a first signal terminal and a second signal terminal, and a right side surface of the adjustment portion of the second signal terminal on the left side of the second ground terminal and a left side surface of the adjustment portion of the first signal terminal on the right side of the second ground terminal are at least partially exposed in the same opening.
Further, the area of the second signal terminal exposed in the opening on the left side of the second ground terminal is equal to the area of the first signal terminal exposed in the opening on the right side of the second ground terminal.
Further, the differential signal terminal pair includes a first signal terminal and a second signal terminal, and the adjustment portion of the second signal terminal on the left side of the second ground terminal and the adjustment portion of the first signal terminal on the right side of the second ground terminal are not exposed in the opening.
The insulating body is provided with a slot which is concavely arranged backwards and is used for an electronic element to be inserted, the slot is provided with a stop surface, the electronic element is abutted against the stop surface, the insulating block is positioned in the insulating body and provided with a butting surface, the butting surface is positioned behind the stop surface, each terminal is provided with an extending part which extends forwards from the fixing part and exceeds the butting surface but does not exceed the stop surface, a barrier is arranged between any two adjacent extending parts in the same row, a gap is arranged between the barrier and the extending parts, and air is positioned in the gap.
Furthermore, the trompil sets up in being close to one side of butt joint face, insulator has a holding chamber, the insulating block with one row the terminal is located in the holding chamber, each the terminal with have the clearance between the inner wall in holding chamber, the air is located the clearance.
Further, the width of the adjusting portion is smaller than that of the extending portion, the center distance between each portion of two adjacent terminals in the same row is equal, and the distance between the adjusting portions of two adjacent terminals in the same row is greater than the distance between the extending portions of two adjacent terminals in the same row.
Further, the insulating block is equipped with two, the terminal is arranged into two rows, wherein one row the terminal includes at least two first ground terminal, at least one second ground terminal and at least two differential signal terminal pair, another row the terminal includes at least one first ground terminal, at least two second ground terminals and at least two differential signal terminal pair, two on the insulating block the trompil in the thickness direction dislocation set of insulating block.
Further, the number of the insulating blocks is three, and the insulating blocks include a first insulating block, a second insulating block and a third insulating block, the terminals are arranged in an upper row and a lower row, the terminals and the first insulating block are arranged in an upper row and a lower row, the fixing portions of the terminals in the upper row are fixed to the first insulating block, the terminals in the lower row are injection molded together with the second insulating block and the third insulating block, the fixing portion of each terminal in the lower row includes a first fixing portion and a second fixing portion, the first fixing portion is fixed to the second insulating block, the second fixing portion is fixed to the third insulating block, and the length of the fixing portion of the terminal in the upper row is greater than the length of the first fixing portion of the terminal in the lower row and is greater than the length of the second fixing portion of the terminal in the lower row.
Further, each of the first fixing portions has a first adjustment portion, each of the second fixing portions has a second adjustment portion, the first adjustment portion and the second adjustment portion of the second ground terminal are exposed to the opening, and the first adjustment portion and the second adjustment portion of the first ground terminal are not exposed to the opening.
Compared with the prior art, the electric connector has the following beneficial effects:
in the transmission module including first ground terminals, differential signal terminals, second ground terminals, differential signal terminals, and first ground terminals, the adjustment portion of the second ground terminal is exposed in the opening, the adjustment portions of the two first ground terminals are not exposed in the opening, the surrounding medium of the adjustment portion of the second ground terminal is air, and the surrounding medium of the adjustment portion of the first ground terminal is plastic, so that the dielectric coefficient of the surrounding medium of the second ground terminal is smaller than that of the surrounding medium of the first ground terminal, the electromagnetic energy of the second ground terminal is different from that of the first ground terminal, and the electromagnetic waves of the second ground terminal and the electromagnetic waves of the first ground terminal are not overlapped and added, thereby reducing resonance between the second ground terminal and the first ground terminal and avoiding generation of ground mode resonance.
[ description of the drawings ]
FIG. 1 is a perspective assembly view of the electrical connector of the present invention;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
fig. 3 is a rear view of the housing of the electrical connector of the present invention;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;
FIG. 5 is a perspective view of the upper and lower rows of terminals of the electrical connector of the present invention;
FIG. 6 is a cross-sectional view taken along line C-C of FIG. 5;
FIG. 7 is an enlarged view of E in FIG. 6;
FIG. 8 is a top view of FIG. 5;
FIG. 9 is a cross-sectional view taken along line D-D of FIG. 5;
fig. 10 is an enlarged view of F of fig. 9.
Detailed description of the embodiments reference is made to the accompanying drawings in which:
electrical connector 100 Docking element 200 Circuit board 300
Insulating body 1 Socket 11 Stop surface 111 First side wall 12
Second side wall 13 First accommodation cavity 14 First partition 141 Second receiving chamber 15
Second barrier 151 Third accommodating cavity 16 Bump 161 First insulating block 2
First butting face 21 First opening 22 Second insulating block 3 Second abutting surface 31
Second opening 32 Third insulating block 4 Third opening 42 Open slot 43
Terminal 5 First ground terminal G1 Second ground terminal G2 Differential signal terminal pair S1S2
First signal terminal S1 Second signal terminal S2 Fixed part 51 Adjusting part 511
First fixed part 52 First regulating part 521 Second fixed part 53 Second adjusting part 531
Extension 54 Contact arm 55 Weld 56 Metal shell 6
Center distance L1 First spacing L2 Second spacing L3
[ detailed description ] embodiments
For a better understanding of the objects, structure, features, and functions of the invention, reference should be made to the drawings and detailed description that follow.
As shown in fig. 1 to fig. 3, the electrical connector 100 of the present invention is used for electrically connecting a docking element 200 and a circuit board 300, and transmitting a high frequency signal of the docking element 200 to the circuit board 300, wherein the docking element 200 may be a cable, an electronic card, a flexible circuit board, etc., and in this embodiment, the docking element 200 is an electronic card. The electrical connector 100 includes an insulating body 1, a first insulating block 2, a second insulating block 3 and a third insulating block 4 assembled to the insulating body 1, the first insulating block 2 and the upper row of the plurality of terminals 5 are injection molded, the upper row of the plurality of terminals 5 is arranged at intervals along the left and right direction of the first insulating block 2, the second insulating block 3 and the third insulating block 4 are injection molded with the same lower row of the plurality of terminals 5, the lower row of the plurality of terminals 5 is arranged at intervals along the left and right direction of the second insulating block 3 and the third insulating block 4, and a metal shell 6 is coated outside the insulating body 1.
As shown in fig. 2 to 4, the insulating body 1 has a slot 11 recessed rearward, the slot 11 is for the docking element 200 to be inserted, the slot 11 has a stop surface 111, the docking element 200 abuts against the stop surface 111, and the upper side and the lower side of the slot 11 are respectively a first side wall 12 and a second side wall 13. The insulation body 1 is provided with a first accommodating cavity 14, a second accommodating cavity 15 and a third accommodating cavity 16 which are recessed from the back to the front, the first accommodating cavity 14 and the second accommodating cavity 15 are arranged oppositely, the first accommodating cavity 14 extends from the back end of the insulation body 1 to the first side wall 12, the second accommodating cavity 15 extends from the back end of the insulation body 1 to the second side wall 13, the first accommodating cavity 14 is provided with a plurality of first barriers 141 for separating a plurality of upper rows of the terminals 5, and the second accommodating cavity 15 is provided with a plurality of second barriers 151 for separating a plurality of lower rows of the terminals 5.
As shown in fig. 2, 4 and 6, the first insulating block 2 and the insulating body 1 are formed separately, the first insulating block 2 and the upper row of the plurality of terminals 5 are assembled in the first receiving cavity 14 after injection molding, the first insulating block 2 has a first abutting surface 21, the upper row of the plurality of terminals 5 extends forward from the first abutting surface 21 into the first sidewall 12, the first insulating block 2 is provided with a plurality of first openings 22 arranged at intervals in the left-right direction, and the first openings 22 penetrate through the first insulating block 2 in the thickness direction. The second insulating block 3 and the insulating body 1 are formed separately, after the second insulating block 3 and the third insulating block 4 are injection-molded with a plurality of terminals 5 in the same lower row, the second insulating block 3 and the lower row of the plurality of terminals 5 are assembled in the second accommodating cavity 15, while the third insulating block 4 and the lower row of the plurality of terminals 5 are assembled in the third receiving cavity 16, the second insulating block 3 has a second abutting surface 31, a plurality of terminals 5 in the lower row extend forward from the second abutting surface 31 into the second sidewall 13, the second insulating block 3 has a plurality of second openings 32 arranged at intervals in the left-right direction, the second opening 32 penetrates the second insulating block 3 in the thickness direction thereof, the third insulating block 4 has a plurality of third openings 42 arranged at intervals in the left-right direction, and the third openings 42 penetrate the third insulating block 4 in the thickness direction thereof in the front-back direction.
The first insulating block 2, the second insulating block 3, the third insulating block 4 and the insulating body 1 are formed separately, in other embodiments, the first insulating block 2, the second insulating block 3 and the third insulating block 4 may be integrally provided with the insulating body 1, and the first opening 22, the second opening 32 and the third opening 42 may not penetrate through the thickness of the first insulating block 2, the second insulating block 3 and the third insulating block 4.
As shown in fig. 2, 6 and 8, the terminals 5 are arranged in two rows, each row of the terminals 5 includes a fixing portion 51 fixed in the first insulating block 2, an extending portion 54 extending forward from the fixing portion 51 beyond the first abutting surface 21 but not beyond the stopping surface 111, a contact arm 55 extending forward from the extending portion 54, the contact arm 55 abutting against the abutting element 200, and a soldering portion 56 extending downward from the fixing portion 51, and the soldering portion 56 is soldered on the circuit board 300. Referring to fig. 2 and 4, the first spacer 141 is disposed between any two adjacent extending portions 54 to reduce interference between the extending portions 54 of the terminals 5 in the upper row, a gap is disposed between the first spacer 141 and the extending portions 54, the extending portions 54 and the contact arms 55 of the terminals 5 in the upper row are received in the first receiving cavities 14, gaps are disposed between the extending portions 54 and the contact arms 55 and inner walls of the first receiving cavities 14, and air is located in the gaps. The extending portion 54 and the contact arm 55 of the terminal 5 in the upper row are accommodated in the first accommodating cavity 14 and have the first partition 141 and air around them, and the surrounding medium includes most of plastic medium and a proper amount of air medium, so as to adjust the impedance values of the extending portion 54 and the contact arm 55 of the terminal 5 in the upper row to a proper impedance range.
As shown in fig. 2, 5 and 6, each lower row of the terminals 5 is injection molded with the second insulating block 3 and the third insulating block 4, the fixing portion 51 of each lower row of the terminals 5 includes a first fixing portion 52 and a second fixing portion 53, the first fixing portion 52 is fixed in the second insulating block 3, the second fixing portion 53 is fixed in the third insulating block 4, the first fixing portion 52 extends forward beyond the second abutting surface 31 but does not extend beyond the stopping surface 111 to form the extending portion 54, the extending portion 54 extends forward to form the contact arm 55, the contact arm 55 abuts against the abutting element 200, the second fixing portion 53 extends downward to form the soldering portion 56, and the soldering portion 56 is soldered on the circuit board 300. Referring to fig. 2 and 4, the second spacer 151 is disposed between any two adjacent extending portions 54 to reduce interference between the extending portions 54 of the terminals 5 in the lower row, a gap is formed between the second spacer 151 and the extending portions 54, the extending portions 54 and the contact arms 55 of the terminals 5 in the lower row are received in the second receiving cavities 15, gaps are formed between the extending portions 54 and the contact arms 55 and inner walls of the second receiving cavities 15, and air is located in the gaps. The extension 54 and the contact arm 55 of the lower row of terminals are accommodated in the second accommodating cavity 15 and have the second partition 151 and air around them, and the surrounding medium includes most of plastic medium and a proper amount of air medium, so as to adjust the impedance of the extension 54 and the contact arm 55 of the lower row of terminals 5 to a proper impedance range.
As shown in fig. 2, the length of the fixing portion 51 of the upper row of the terminals 5 is greater than the length of the first fixing portion 52 of the lower row of the terminals 5 and greater than the length of the second fixing portion 53 of the lower row of the terminals 5, that is, the volume of the upper row of the terminals 5 fixed in the first insulating block 2 is greater than the volume of the lower row of the terminals 5 fixed in the second insulating block 3 and greater than the volume of the lower row of the terminals 5 fixed in the third insulating block 4, if the lower row of the terminals 5 is fixed only in the second insulating block 3 or only in the third insulating block 4, the volume exposed in the air without being covered by the insulating block is too large, which easily causes the overall impedance value of the lower row of the terminals 5 to be too high, and is not favorable for transmitting high-speed signals. The lower row of the terminals 5 is simultaneously fixed to the second insulating block 3 and the third insulating block 4, thereby increasing the volume of the fixing portion 51 of the lower row of the terminals 5, thereby adjusting the overall impedance of the lower row of the terminals 5 to a suitable impedance range.
As shown in fig. 6, 7 and 9, each row of the terminals 5 includes a plurality of first ground terminals G1, a plurality of second ground terminals G2 and a plurality of differential signal terminal pairs S1S2, each differential signal terminal pair S1S2 includes a first signal terminal S1 and a second signal terminal S2, and the terminals 5 are arranged in an upper row: one of the first ground terminals G1, one of the differential signal terminal pairs S1S2, one of the second ground terminals G2, one of the differential signal terminal pairs S1S2, and one of the first ground terminals G1, that is, one of the first ground terminals G1 and one of the second ground terminals G2 are respectively disposed at two sides of each of the differential signal terminal pairs S1S 2. The fixing portion 51 of each upper row of the terminals 5 further has a regulating portion 511, when viewed from top to bottom, the regulating portion 511 of the second ground terminal G2 is exposed to the first opening 22, the regulating portion 511 of the first ground terminal G1 is not exposed to the first opening 22, the regulating portion 511 of the second ground terminal G2 is exposed to the air, and the regulating portion 511 of the first ground terminal G1 is not exposed to the air, so that the dielectric constant of the surrounding medium of the regulating portion 511 of the second ground terminal G2 is smaller than the dielectric constant of the surrounding medium of the regulating portion 511 of the first ground terminal G1, the electromagnetic energy of the second ground terminal G2 is different from the electromagnetic energy of the first ground terminal G1, and the electromagnetic wave peaks of the second ground terminal G2 and the electromagnetic wave peaks of the first ground terminal G1 do not overlap, resonance between the second ground terminal G2 and the first ground terminal G1 is reduced, avoiding ground mode resonance.
As shown in fig. 6 to 8, in order to make the circumference of the adjustment portion 511 of the second ground terminal G2 have more air media, the depth of the first opening 22 is set to make both left and right side surfaces of the adjustment portion 511 of the second ground terminal G2 exposed to the first opening 22, therefore, the difference between the dielectric constant of the surrounding medium of the second ground terminal G2 and the dielectric constant of the surrounding medium of the first ground terminal G1 is increased, the difference between the electromagnetic energy of the second ground terminal G2 and the electromagnetic energy of the first ground terminal G1 is increased, the electromagnetic wave peak of the second ground terminal G2 and the electromagnetic wave peak of the first ground terminal G1 are less overlapped and added, the resonance between the second ground terminal G2 and the first ground terminal G1 is further reduced, and the ground mode resonance is further avoided.
As shown in fig. 6 to 8, a distance from a left side surface of the first opening 22 to the second ground terminal G2 is equal to a distance from a right side surface of the first opening 22 to the second ground terminal G2, the first opening 22 is symmetrical with respect to the second ground terminal G2, and a distance from the adjustment portion 511 of the second signal terminal S2 on the left side of the second ground terminal G2 to the first opening 22 is equal to a distance from the adjustment portion 511 of the first signal terminal S1 on the right side of the second ground terminal G2 to the first opening 22, and the arrangement of the first opening 22 has the same influence on the differential signal terminal pair S1S2 on the left and right sides of the second ground terminal G2, thereby facilitating balance between the differential signal terminal pair S1S2 on the left and right sides of the second ground terminal G2.
As shown in fig. 6 to 8, the right side surface of the adjustment portion 511 of the second signal terminal S2 on the left side of the second ground terminal G2 and the left side surface of the adjustment portion 511 of the first signal terminal S1 on the right side of the second ground terminal G2 are exposed in the same first opening 22, the first opening 22 is formed from the right side of the adjustment portion 511 of the second signal terminal S2 on the left side of the second ground terminal G2 to the left side of the adjustment portion 511 of the first signal terminal S1 on the right side of the second ground terminal G2, and the first opening 22 is formed between the differential signal terminal pair S1S2 and the second ground terminal G2, so that the dielectric constant between the differential signal terminal pair S1S2 and the second ground terminal G2 is changed from plastic to air, and the dielectric constant of the surrounding medium between the two terminals is reduced, thereby properly increasing the impedance of the electrical connector 100 to achieve an optimal impedance range. The adjusting portions 511 of the differential signal terminal pairs S1S2 each have a side surface exposed in the first opening 22, preferably, the area of the second signal terminal S2 exposed on the left side of the second ground terminal G2 in the first opening 22 is equal to the area of the first signal terminal S1 exposed on the right side of the second ground terminal G2 in the first opening 22, the impedance values adjusted by the differential signal terminal pairs S1S2 exposed on the left and right sides of the second ground terminal G2 are the same, and the two differential signal terminal pairs S1S2 have balanced impedance, which is favorable for stable transmission of high-speed signals.
As shown in fig. 6, at this time, the width of the first opening 22 is maximized, so that more air medium is present around the adjusting portion 511 of the second ground terminal G2, the difference between the dielectric constant of the medium around the second ground terminal G2 and the dielectric constant of the medium around the first ground terminal G1 is increased, the difference between the electromagnetic energy of the second ground terminal G2 and the electromagnetic energy of the first ground terminal G1 is increased, the electromagnetic wave peak of the second ground terminal G2 and the electromagnetic wave peak of the first ground terminal G1 are less overlapped, the resonance between the second ground terminal G2 and the first ground terminal G1 is reduced, and the ground mode resonance is more avoided. In other embodiments, the right side of the adjustment portion 511 of the second signal terminal S2 on the left side of the second ground terminal G2 and the left side of the adjustment portion 511 of the first signal terminal S1 on the right side of the second ground terminal G2 may not be exposed in the first opening 22, so long as the impedance values adjusted by the differential signal terminal pair S1S2 on the left and right sides of the second ground terminal G2 are ensured to be the same, so that the impedance between the two differential signal terminal pairs S1S2 is balanced.
As shown in fig. 2 and 6, the terminals 5 in the lower row are arranged in sequence as follows: one of the second ground terminals G2, one of the differential signal terminal pairs S1S2, one of the first ground terminals G1, one of the differential signal terminal pairs S1S2, and one of the second ground terminals G2. The first fixing portion 52 of each lower row of the terminals 5 has a first adjusting portion 521, the second fixing portion 53 of each lower row of the terminals 5 has a second adjusting portion 531, when viewed from bottom to top, the first adjusting portion 521 of the second ground terminal G2 is exposed to the second opening 32, the second adjusting portion 531 of the second ground terminal G2 is exposed to the third opening 42, the first adjusting portion 521 of the first ground terminal G1 is not exposed to the second opening 32, the second adjusting portion 531 of the first ground terminal G1 is not exposed to the third opening 42, the first adjusting portion 521 and the second adjusting portion 531 of the second ground terminal G2 are both exposed to the air, and the first adjusting portion 521 of the first ground terminal G1 is not exposed to the air, so that the dielectric constant of the surrounding media of the first adjusting portion 521 and the second adjusting portion 531 of the second ground terminal G2 is smaller than the dielectric constant of the surrounding media of the second adjusting portion 531 The dielectric coefficients of the surrounding media of the first adjusting part 521 and the second adjusting part 531 of the ground terminal G1 are different from the electromagnetic energy of the second ground terminal G2 to the electromagnetic energy of the first ground terminal G1, so that the electromagnetic wave peak of the second ground terminal G2 and the electromagnetic wave peak of the first ground terminal G1 do not overlap and add, the resonance between the second ground terminal G2 and the first ground terminal G1 is reduced, and the ground mode resonance is avoided.
As shown in fig. 6, in the two rows of the terminals 5, the second ground terminal G2 on the upper row and the second ground terminal G2 on the lower row are disposed in a staggered manner, that is, the first opening 22 and the second opening 32 are also disposed in a staggered manner, electromagnetic energy of the first ground terminal G1 on the upper row and the second ground terminal G2 on the lower row or the second ground terminal G2 on the upper row and the first ground terminal G1 on the lower row are different, electromagnetic wave peaks of the two electromagnetic waves are not overlapped and added, so that resonance between the two electromagnetic waves is reduced, and ground mode resonance is avoided.
As shown in fig. 2, 4 and 6, the third insulating block 4 has a slot 43, the second fixing portion 53 of the lower row of the terminals 5 is fixed to the third insulating block 4, the second adjusting portion 531 of the lower row of the terminals 5 is partially exposed from the slot 43, the third insulating block 4 is assembled and accommodated in the third accommodating cavity 16, a protrusion 161 is arranged in the third accommodating cavity 16, the protrusion 161 is accommodated in the slot 43, and the protrusion 161 does not abut against the second adjusting portion 531. A gap is formed between the second adjusting portion 531 and the protrusion 161, and air is located in the gap to adjust the impedance value of the lower row of the terminals 5 to be within a proper impedance range.
As shown in fig. 9 and 10, for example, in the upper row of terminals, the width of the adjustment portion 511 is smaller than the width of the extension portion 54, the center distances L1 between the portions of two adjacent terminals 5 are equal, the distance between the adjustment portions 511 of two adjacent terminals 5 is defined as a first pitch L2, the distance between the extension portions 54 of two adjacent terminals 5 is defined as a second pitch L3, and the first pitch L2 is greater than the second pitch L3. The width of the adjustment portion 511 is small, and the aperture may be set large enough to increase the difference between the resonance frequency of the second ground terminal G2 and the resonance frequency of the first ground terminal G1, further reduce the resonance between the second ground terminal G2 and the first ground terminal G1, and further avoid ground mode resonance.
As shown in fig. 4, 9 and 10, the center-to-center distance L1 refers to the centerline-to-centerline distance, which refers to the separation between the two. The impedance of the terminal 5 is inversely proportional to the dielectric constant of the surrounding medium of the terminal 5, referring to fig. 2, there is a gap between the extension portion 54 and the inner wall of the first receiving cavity 14, and there is a gap between the extension portion 54 and the first rail 141, there is more air medium around the extension portion 54, the impedance of the extension portion 54 is higher, the energy is higher, and more energy is reflected, a second distance L3 between the extension portion 54 of the second ground terminal G2 and the extension portion 54 of the adjacent differential signal terminal pair S1S2 is small, and the first rail 141 is arranged between the extension portion 54 of the second ground terminal G2 and the extension portion 54 of the adjacent differential signal terminal pair S1S2, and the coupling is good, so as to facilitate the second ground terminal G2 to absorb the energy reflected from the adjacent differential signal terminal pair S1S2, thereby reducing the effect of the differential signal terminal pair S1S2 on other adjacent differential signal terminal pairs S1S 2; the adjusting portion 511 of the differential signal terminal pair S1S2 is almost covered by the first insulating block 2, the surrounding medium has more plastic medium, the impedance of the differential signal terminal pair S1S2 is lower, the energy is lower, the first opening 22 is arranged between the adjusting portion 511 of the second ground terminal G2 and the adjusting portion 511 of the adjacent differential signal terminal pair S1S2, and the width of the adjusting portion 511 is reduced, so that the first distance L2 between the adjusting portion 511 of the second ground terminal G2 and the adjusting portion 511 of the adjacent differential signal terminal pair S1S2 is increased, the air medium between the two is more, the capacitance is small, the coupling is low, and the influence of the second ground terminal G2 on the adjacent differential signal terminal pair S1S2 is reduced.
As shown in fig. 3, 9 and 10, for the differential signal terminal pair S1S2, the first barrier 141 and air are provided between the extending portions 54 of the differential signal terminal pair S1S2, the first insulating block 2 is provided between the adjusting portions 511 of the differential signal terminal pair S1S2, so that the dielectric coefficient of the surrounding medium of the adjusting portions 511 of the differential signal terminal pair S1S2 is greater than the dielectric coefficient of the surrounding medium between the extending portions 54 of the differential signal terminal pair S1S2, the impedance of the adjusting portion 511 of the differential signal terminal pair S1S2 is smaller than the impedance of the extending portions 54 of the differential signal terminal pair S1S2, and the impedance of the differential signal terminal pair S1S2 is abruptly changed from the extending portions 54 to the adjusting portions 511, which is disadvantageous for stable high-speed transmission of signals, so that the width of the adjusting portions 511 is reduced to increase the first pitch L2 between the adjusting portions 511 of the differential signal terminal pair S1S2, the impedance of the differential signal terminal pair S1S2 is properly improved, and the impedance abrupt change of the differential signal terminal pair S1S2 is reduced, so that the signals are transmitted stably at high speed. The first opening 22 is disposed on a side close to the first abutting surface 21, so that the distance from the extension portion 54 to the adjustment portion 511 is reduced, the distance of the impedance jump is reduced, and adverse effects caused by the impedance jump are buffered as soon as possible. The properties of the terminals 5 in the lower row are substantially identical to those of the terminals 5 in the upper row, and will not be described in detail here.
In summary, the electrical connector 100 of the present invention has the following advantages:
1. the adjustment portion 511 of the second ground terminal G2 is exposed in the first opening 22, the adjustment portion 511 of the first ground terminal G1 is not exposed in the first opening 22, the adjustment portion 511 of the second ground terminal G2 is exposed in the air, and the adjustment portion 511 of the first ground terminal G1 is not exposed in the air, so that the dielectric coefficient of the surrounding medium of the adjustment portion 511 of the second ground terminal G2 is smaller than the dielectric coefficient of the surrounding medium of the adjustment portion 511 of the first ground terminal G1, the electromagnetic energy of the second ground terminal G2 is different from the electromagnetic energy of the first ground terminal G1, the electromagnetic wave peak of the second ground terminal G2 and the electromagnetic wave peak of the first ground terminal G1 do not overlap and add, thereby reducing the resonance between the second ground terminal G2 and the first ground terminal G1, avoiding ground mode resonance.
2. The width of the regulating portion 511 is smaller than the width of the extending portion 54, the center distance L1 between each portion of two adjacent terminals 5 is equal, and the first distance L2 between the regulating portions 511 of two adjacent terminals 5 is larger than the second distance L3 between the extending portions 54 of two adjacent terminals 5. The width of the adjustment portion 511 is small, and the aperture may be set large enough to increase the difference between the resonance frequency of the second ground terminal G2 and the resonance frequency of the first ground terminal G1, further reduce the resonance between the second ground terminal G2 and the first ground terminal G1, and further avoid ground mode resonance.
3. In the two rows of the terminals 5, the second ground terminal G2 on the upper row and the second ground terminal G2 on the lower row are disposed in a staggered manner, that is, the first opening 22 and the second opening 32 are also disposed in a staggered manner, electromagnetic energy of the first ground terminal G1 on the upper row and the second ground terminal G2 on the lower row or the second ground terminal G2 on the upper row and the first ground terminal G1 on the lower row are different, electromagnetic wave peaks of the two terminals are not overlapped and added, so that resonance between the two terminals is reduced, and ground mode resonance is avoided.
The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all technical changes that can be made by applying the present specification and the drawings are included in the scope of the present invention.

Claims (12)

1. An electrical connector, comprising:
an insulating block having at least one opening in a thickness direction thereof;
at least one row of terminals arranged along the left and right directions of the insulating block, each terminal is provided with a fixing part fixed in the insulating block, the fixing part is provided with an adjusting part, one row of terminals comprises at least two first ground terminals, at least one second ground terminal and at least two differential signal terminal pairs, and the arrangement mode corresponding to the left and right directions is as follows: the first ground terminal, the differential signal terminal pair, the second ground terminal, the differential signal terminal pair and the first ground terminal are arranged in a staggered manner, the adjustment part of the second ground terminal is exposed in the opening, and the adjustment part of the first ground terminal is not exposed in the opening.
2. The electrical connector of claim 1, wherein: the left and right side surfaces of the adjusting portion of the second ground terminal are exposed in the opening.
3. The electrical connector of claim 2, wherein: the distance from the left side surface of the opening to the second ground terminal is equal to the distance from the right side surface of the opening to the second ground terminal.
4. The electrical connector of claim 1, wherein: the differential signal terminal pair comprises a first signal terminal and a second signal terminal, and the right side surface of the adjusting part of the second signal terminal on the left side of the second ground terminal and the left side surface of the adjusting part of the first signal terminal on the right side of the second ground terminal are at least partially exposed in the same opening.
5. The electrical connector of claim 4, wherein: the area of the second signal terminal on the left side of the second ground terminal exposed in the opening is equal to the area of the first signal terminal on the right side of the second ground terminal exposed in the opening.
6. The electrical connector of claim 1, wherein: the differential signal terminal pair comprises a first signal terminal and a second signal terminal, and the adjusting part of the second signal terminal on the left side of the second ground terminal and the adjusting part of the first signal terminal on the right side of the second ground terminal are not exposed in the opening.
7. The electrical connector of claim 1, wherein: the insulating body is provided with a slot which is concavely arranged backwards and is used for an electronic element to be inserted, the slot is provided with a stop surface, the electronic element is abutted against the stop surface, the insulating block is positioned in the insulating body and provided with a butting surface, the butting surface is positioned behind the stop surface, each terminal is provided with an extending part which extends forwards from the fixing part and exceeds the butting surface but does not exceed the stop surface, a barrier is arranged between any two adjacent extending parts in the same row, a gap is arranged between the barrier and the extending parts, and air is positioned in the gap.
8. The electrical connector of claim 7, wherein: the trompil sets up and is being close to one side of butt joint face, insulator has a holding chamber, insulating block and one row the terminal is located in the holding chamber, each the terminal with have the clearance between the inner wall in holding chamber, the air is located the clearance.
9. The electrical connector of claim 7, wherein: the width of the adjusting part is smaller than that of the extending part, the center distance between each part of two adjacent terminals in the same row is equal, and the distance between the adjusting parts of two adjacent terminals in the same row is larger than that between the extending parts of two adjacent terminals in the same row.
10. The electrical connector of claim 1, wherein: the insulating block is equipped with two, the terminal row becomes two rows, and wherein one row the terminal includes at least two first ground terminal, at least one the second ground terminal and at least two differential signal terminal pair, another row the terminal includes at least one first ground terminal, at least two second ground terminal and at least two differential signal terminal pair, two on the insulating block the trompil in the thickness direction dislocation set of insulating block.
11. The electrical connector of claim 1, wherein: the insulation blocks are three and comprise a first insulation block, a second insulation block and a third insulation block, the terminals are arranged into an upper row and a lower row, the terminals and the first insulation block are arranged on the upper row in an injection molding mode, the fixing parts of the terminals on the upper row are fixed on the first insulation block, the terminals on the lower row are injection molded together with the second insulation block and the third insulation block, the fixing part of each terminal on the lower row comprises a first fixing part and a second fixing part, the first fixing part is fixed on the second insulation block, the second fixing part is fixed on the third insulation block, and the length of the fixing part of the terminal on the upper row is larger than the length of the first fixing part of the terminal on the lower row and is larger than the length of the second fixing part of the terminal on the lower row.
12. The electrical connector of claim 11, wherein: each first fixing portion has a first adjusting portion, each second fixing portion has a second adjusting portion, the first adjusting portion and the second adjusting portion of the second ground terminal are exposed to the opening, and the first adjusting portion and the second adjusting portion of the first ground terminal are not exposed to the opening.
CN202010029842.5A 2020-01-13 2020-01-13 Electrical connector Active CN111244697B (en)

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